Our depth filter sheets are a three-dimensional depth filter made of adsorbents with an impressively large internal surface area. Imagine the adsorbents as a complex network of chambers and channels of different lengths in which contaminants are efficiently trapped.

In contrast to conventional screen filtration, the entire filtration surface is considerably larger with the depth filter layer, which significantly increases the quantity of filtered solution.

Filtration mechanism: Triple safety for your processes

Three different types of filtration work together in the filtration process through the depth filter layer. These mechanisms work together to ensure an outstanding result:

1. Mechanical filtration
   Foreign bodies and particles that are larger than the pores of the filter layer remain mechanically on the surface of the layer and are effectively retained.
2. Electrostatic adsorption
   This is a weak molecular interaction, known as Van der Waals forces, which occur between the particles in the solution and the material of the filter layer. This also traps smaller particles inside the layer, in the chambers and channels.
3. Elektrokinetische Adsorption
   Dieser Mechanismus basiert auf dem sogenannten Zeta-Potential. Durch eine spezielle Modifikation der Polyelektrolyten wird die Filterschicht positiv geladen. Diese positive Ladung sorgt dafür, dass negativ geladene Schmutzpartikel, Mikroorganismen und Viren in Suspensionsflüssigkeiten effizient erfasst werden – selbst Partikel, die um ein Zehnfaches kleiner als die Porengröße der Filterschicht sind.

Versatile applications and formats

Depth filter sheets are supplied in the formats 20x20, 40x40 and 60x61.4 cm. Based on specific customer requirements, other dimensions are also available, such as round sheets or sheets with special hole patterns.

Your advantages at a glance:

• Maximum filtration surface:
  The large inner surface of the filter layer enables a higher quantity of filtered solution.
• Versatile filtration mechanisms:
  Mechanical, electrostatic and electrokinetic adsorption work together for the best filtration results.
• Efficient particle binding:
  Effective capture of particles, microorganisms and viruses, even at the smallest sizes.
• Flexibility:
  Available in various formats and customizable to your specific requirements on request.

Areas of application:

• Chemical industry
• Food and beverage production
• Pharmaceutical industry
• Water treatment
• Life Science
• Cosmetic products / Cosmetics industry